diff --git a/Makefile b/Makefile
index afdfa9d2..50b46882 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ proto:
 	protoc --gogofaster_out=$(PKGMAP):. --go-drpc_out=protolib=github.com/gogo/protobuf:. commonfile/fileproto/protos/*.proto
 	protoc --gogofaster_out=$(PKGMAP):. --go-drpc_out=protolib=github.com/gogo/protobuf:. net/streampool/testservice/protos/*.proto
 	protoc --gogofaster_out=:. net/secureservice/handshake/handshakeproto/protos/*.proto
+	protoc --gogofaster_out=$(PKGMAP):. --go-drpc_out=protolib=github.com/gogo/protobuf:. coordinator/coordinatorproto/protos/*.proto
 
 deps:
 	go mod download
diff --git a/coordinator/coordinatorproto/coordinator.pb.go b/coordinator/coordinatorproto/coordinator.pb.go
new file mode 100644
index 00000000..34830703
--- /dev/null
+++ b/coordinator/coordinatorproto/coordinator.pb.go
@@ -0,0 +1,1431 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: coordinator/coordinatorproto/protos/coordinator.proto
+
+package coordinatorproto
+
+import (
+	fmt "fmt"
+	proto "github.com/gogo/protobuf/proto"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
+
+type SpaceSignRequest struct {
+	SpaceId string `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
+}
+
+func (m *SpaceSignRequest) Reset()         { *m = SpaceSignRequest{} }
+func (m *SpaceSignRequest) String() string { return proto.CompactTextString(m) }
+func (*SpaceSignRequest) ProtoMessage()    {}
+func (*SpaceSignRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_d94f6f99586adae2, []int{0}
+}
+func (m *SpaceSignRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *SpaceSignRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_SpaceSignRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *SpaceSignRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SpaceSignRequest.Merge(m, src)
+}
+func (m *SpaceSignRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *SpaceSignRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SpaceSignRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SpaceSignRequest proto.InternalMessageInfo
+
+func (m *SpaceSignRequest) GetSpaceId() string {
+	if m != nil {
+		return m.SpaceId
+	}
+	return ""
+}
+
+type SpaceSignResponse struct {
+	Receipt *SpaceReceiptWithSignature `protobuf:"bytes,1,opt,name=receipt,proto3" json:"receipt,omitempty"`
+}
+
+func (m *SpaceSignResponse) Reset()         { *m = SpaceSignResponse{} }
+func (m *SpaceSignResponse) String() string { return proto.CompactTextString(m) }
+func (*SpaceSignResponse) ProtoMessage()    {}
+func (*SpaceSignResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_d94f6f99586adae2, []int{1}
+}
+func (m *SpaceSignResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *SpaceSignResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_SpaceSignResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *SpaceSignResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SpaceSignResponse.Merge(m, src)
+}
+func (m *SpaceSignResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *SpaceSignResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_SpaceSignResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SpaceSignResponse proto.InternalMessageInfo
+
+func (m *SpaceSignResponse) GetReceipt() *SpaceReceiptWithSignature {
+	if m != nil {
+		return m.Receipt
+	}
+	return nil
+}
+
+// SpaceReceiptWithSignature contains protobuf encoded receipt and its signature
+type SpaceReceiptWithSignature struct {
+	SpaceReceiptPayload []byte `protobuf:"bytes,1,opt,name=spaceReceiptPayload,proto3" json:"spaceReceiptPayload,omitempty"`
+	Signature           []byte `protobuf:"bytes,2,opt,name=signature,proto3" json:"signature,omitempty"`
+}
+
+func (m *SpaceReceiptWithSignature) Reset()         { *m = SpaceReceiptWithSignature{} }
+func (m *SpaceReceiptWithSignature) String() string { return proto.CompactTextString(m) }
+func (*SpaceReceiptWithSignature) ProtoMessage()    {}
+func (*SpaceReceiptWithSignature) Descriptor() ([]byte, []int) {
+	return fileDescriptor_d94f6f99586adae2, []int{2}
+}
+func (m *SpaceReceiptWithSignature) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *SpaceReceiptWithSignature) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_SpaceReceiptWithSignature.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *SpaceReceiptWithSignature) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SpaceReceiptWithSignature.Merge(m, src)
+}
+func (m *SpaceReceiptWithSignature) XXX_Size() int {
+	return m.Size()
+}
+func (m *SpaceReceiptWithSignature) XXX_DiscardUnknown() {
+	xxx_messageInfo_SpaceReceiptWithSignature.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SpaceReceiptWithSignature proto.InternalMessageInfo
+
+func (m *SpaceReceiptWithSignature) GetSpaceReceiptPayload() []byte {
+	if m != nil {
+		return m.SpaceReceiptPayload
+	}
+	return nil
+}
+
+func (m *SpaceReceiptWithSignature) GetSignature() []byte {
+	if m != nil {
+		return m.Signature
+	}
+	return nil
+}
+
+// SpaceReceipt contains permission to SpacePush operation
+type SpaceReceipt struct {
+	SpaceId string `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
+	// identity of space owner
+	AccountIdentity []byte `protobuf:"bytes,2,opt,name=accountIdentity,proto3" json:"accountIdentity,omitempty"`
+	// identity of control node
+	ControlNodeIdentity []byte `protobuf:"bytes,3,opt,name=controlNodeIdentity,proto3" json:"controlNodeIdentity,omitempty"`
+	// unix-timestamp with a deadline time of receipt validity
+	ValidUntil uint64 `protobuf:"varint,4,opt,name=validUntil,proto3" json:"validUntil,omitempty"`
+}
+
+func (m *SpaceReceipt) Reset()         { *m = SpaceReceipt{} }
+func (m *SpaceReceipt) String() string { return proto.CompactTextString(m) }
+func (*SpaceReceipt) ProtoMessage()    {}
+func (*SpaceReceipt) Descriptor() ([]byte, []int) {
+	return fileDescriptor_d94f6f99586adae2, []int{3}
+}
+func (m *SpaceReceipt) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *SpaceReceipt) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_SpaceReceipt.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *SpaceReceipt) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SpaceReceipt.Merge(m, src)
+}
+func (m *SpaceReceipt) XXX_Size() int {
+	return m.Size()
+}
+func (m *SpaceReceipt) XXX_DiscardUnknown() {
+	xxx_messageInfo_SpaceReceipt.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SpaceReceipt proto.InternalMessageInfo
+
+func (m *SpaceReceipt) GetSpaceId() string {
+	if m != nil {
+		return m.SpaceId
+	}
+	return ""
+}
+
+func (m *SpaceReceipt) GetAccountIdentity() []byte {
+	if m != nil {
+		return m.AccountIdentity
+	}
+	return nil
+}
+
+func (m *SpaceReceipt) GetControlNodeIdentity() []byte {
+	if m != nil {
+		return m.ControlNodeIdentity
+	}
+	return nil
+}
+
+func (m *SpaceReceipt) GetValidUntil() uint64 {
+	if m != nil {
+		return m.ValidUntil
+	}
+	return 0
+}
+
+// FileLimitCheckRequest contains an account identity and spaceId
+// control node checks that identity owns a given space
+type FileLimitCheckRequest struct {
+	AccountIdentity []byte `protobuf:"bytes,1,opt,name=accountIdentity,proto3" json:"accountIdentity,omitempty"`
+	SpaceId         string `protobuf:"bytes,2,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
+}
+
+func (m *FileLimitCheckRequest) Reset()         { *m = FileLimitCheckRequest{} }
+func (m *FileLimitCheckRequest) String() string { return proto.CompactTextString(m) }
+func (*FileLimitCheckRequest) ProtoMessage()    {}
+func (*FileLimitCheckRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_d94f6f99586adae2, []int{4}
+}
+func (m *FileLimitCheckRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *FileLimitCheckRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_FileLimitCheckRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *FileLimitCheckRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FileLimitCheckRequest.Merge(m, src)
+}
+func (m *FileLimitCheckRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *FileLimitCheckRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_FileLimitCheckRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FileLimitCheckRequest proto.InternalMessageInfo
+
+func (m *FileLimitCheckRequest) GetAccountIdentity() []byte {
+	if m != nil {
+		return m.AccountIdentity
+	}
+	return nil
+}
+
+func (m *FileLimitCheckRequest) GetSpaceId() string {
+	if m != nil {
+		return m.SpaceId
+	}
+	return ""
+}
+
+// FileLimitCheckResponse returns a current space limit in bytes
+type FileLimitCheckResponse struct {
+	Limit uint64 `protobuf:"varint,1,opt,name=limit,proto3" json:"limit,omitempty"`
+}
+
+func (m *FileLimitCheckResponse) Reset()         { *m = FileLimitCheckResponse{} }
+func (m *FileLimitCheckResponse) String() string { return proto.CompactTextString(m) }
+func (*FileLimitCheckResponse) ProtoMessage()    {}
+func (*FileLimitCheckResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_d94f6f99586adae2, []int{5}
+}
+func (m *FileLimitCheckResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *FileLimitCheckResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_FileLimitCheckResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *FileLimitCheckResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FileLimitCheckResponse.Merge(m, src)
+}
+func (m *FileLimitCheckResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *FileLimitCheckResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_FileLimitCheckResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FileLimitCheckResponse proto.InternalMessageInfo
+
+func (m *FileLimitCheckResponse) GetLimit() uint64 {
+	if m != nil {
+		return m.Limit
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*SpaceSignRequest)(nil), "coordinator.SpaceSignRequest")
+	proto.RegisterType((*SpaceSignResponse)(nil), "coordinator.SpaceSignResponse")
+	proto.RegisterType((*SpaceReceiptWithSignature)(nil), "coordinator.SpaceReceiptWithSignature")
+	proto.RegisterType((*SpaceReceipt)(nil), "coordinator.SpaceReceipt")
+	proto.RegisterType((*FileLimitCheckRequest)(nil), "coordinator.FileLimitCheckRequest")
+	proto.RegisterType((*FileLimitCheckResponse)(nil), "coordinator.FileLimitCheckResponse")
+}
+
+func init() {
+	proto.RegisterFile("coordinator/coordinatorproto/protos/coordinator.proto", fileDescriptor_d94f6f99586adae2)
+}
+
+var fileDescriptor_d94f6f99586adae2 = []byte{
+	// 390 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x53, 0xdd, 0x4e, 0xc2, 0x30,
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+	0x68, 0x51, 0xff, 0x42, 0x90, 0x6f, 0x4c, 0x33, 0xc5, 0xd7, 0x90, 0x9b, 0x9c, 0x03, 0x7c, 0xf0,
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+	0x96, 0x96, 0x5d, 0x9d, 0xe7, 0x35, 0xf9, 0x3a, 0xfd, 0x0b, 0x00, 0x00, 0xff, 0xff, 0x99, 0x06,
+	0x09, 0x83, 0x61, 0x03, 0x00, 0x00,
+}
+
+func (m *SpaceSignRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *SpaceSignRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *SpaceSignRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.SpaceId) > 0 {
+		i -= len(m.SpaceId)
+		copy(dAtA[i:], m.SpaceId)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.SpaceId)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *SpaceSignResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *SpaceSignResponse) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *SpaceSignResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.Receipt != nil {
+		{
+			size, err := m.Receipt.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintCoordinator(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *SpaceReceiptWithSignature) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *SpaceReceiptWithSignature) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *SpaceReceiptWithSignature) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.Signature) > 0 {
+		i -= len(m.Signature)
+		copy(dAtA[i:], m.Signature)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.Signature)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.SpaceReceiptPayload) > 0 {
+		i -= len(m.SpaceReceiptPayload)
+		copy(dAtA[i:], m.SpaceReceiptPayload)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.SpaceReceiptPayload)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *SpaceReceipt) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *SpaceReceipt) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *SpaceReceipt) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.ValidUntil != 0 {
+		i = encodeVarintCoordinator(dAtA, i, uint64(m.ValidUntil))
+		i--
+		dAtA[i] = 0x20
+	}
+	if len(m.ControlNodeIdentity) > 0 {
+		i -= len(m.ControlNodeIdentity)
+		copy(dAtA[i:], m.ControlNodeIdentity)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.ControlNodeIdentity)))
+		i--
+		dAtA[i] = 0x1a
+	}
+	if len(m.AccountIdentity) > 0 {
+		i -= len(m.AccountIdentity)
+		copy(dAtA[i:], m.AccountIdentity)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.AccountIdentity)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.SpaceId) > 0 {
+		i -= len(m.SpaceId)
+		copy(dAtA[i:], m.SpaceId)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.SpaceId)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *FileLimitCheckRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *FileLimitCheckRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *FileLimitCheckRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.SpaceId) > 0 {
+		i -= len(m.SpaceId)
+		copy(dAtA[i:], m.SpaceId)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.SpaceId)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.AccountIdentity) > 0 {
+		i -= len(m.AccountIdentity)
+		copy(dAtA[i:], m.AccountIdentity)
+		i = encodeVarintCoordinator(dAtA, i, uint64(len(m.AccountIdentity)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *FileLimitCheckResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *FileLimitCheckResponse) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *FileLimitCheckResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.Limit != 0 {
+		i = encodeVarintCoordinator(dAtA, i, uint64(m.Limit))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintCoordinator(dAtA []byte, offset int, v uint64) int {
+	offset -= sovCoordinator(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *SpaceSignRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.SpaceId)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	return n
+}
+
+func (m *SpaceSignResponse) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Receipt != nil {
+		l = m.Receipt.Size()
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	return n
+}
+
+func (m *SpaceReceiptWithSignature) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.SpaceReceiptPayload)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	l = len(m.Signature)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	return n
+}
+
+func (m *SpaceReceipt) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.SpaceId)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	l = len(m.AccountIdentity)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	l = len(m.ControlNodeIdentity)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	if m.ValidUntil != 0 {
+		n += 1 + sovCoordinator(uint64(m.ValidUntil))
+	}
+	return n
+}
+
+func (m *FileLimitCheckRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.AccountIdentity)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	l = len(m.SpaceId)
+	if l > 0 {
+		n += 1 + l + sovCoordinator(uint64(l))
+	}
+	return n
+}
+
+func (m *FileLimitCheckResponse) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Limit != 0 {
+		n += 1 + sovCoordinator(uint64(m.Limit))
+	}
+	return n
+}
+
+func sovCoordinator(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozCoordinator(x uint64) (n int) {
+	return sovCoordinator(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *SpaceSignRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowCoordinator
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: SpaceSignRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: SpaceSignRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipCoordinator(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *SpaceSignResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowCoordinator
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: SpaceSignResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: SpaceSignResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Receipt", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Receipt == nil {
+				m.Receipt = &SpaceReceiptWithSignature{}
+			}
+			if err := m.Receipt.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipCoordinator(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *SpaceReceiptWithSignature) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowCoordinator
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: SpaceReceiptWithSignature: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: SpaceReceiptWithSignature: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceReceiptPayload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceReceiptPayload = append(m.SpaceReceiptPayload[:0], dAtA[iNdEx:postIndex]...)
+			if m.SpaceReceiptPayload == nil {
+				m.SpaceReceiptPayload = []byte{}
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Signature", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Signature = append(m.Signature[:0], dAtA[iNdEx:postIndex]...)
+			if m.Signature == nil {
+				m.Signature = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipCoordinator(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *SpaceReceipt) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowCoordinator
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: SpaceReceipt: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: SpaceReceipt: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field AccountIdentity", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.AccountIdentity = append(m.AccountIdentity[:0], dAtA[iNdEx:postIndex]...)
+			if m.AccountIdentity == nil {
+				m.AccountIdentity = []byte{}
+			}
+			iNdEx = postIndex
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ControlNodeIdentity", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ControlNodeIdentity = append(m.ControlNodeIdentity[:0], dAtA[iNdEx:postIndex]...)
+			if m.ControlNodeIdentity == nil {
+				m.ControlNodeIdentity = []byte{}
+			}
+			iNdEx = postIndex
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ValidUntil", wireType)
+			}
+			m.ValidUntil = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.ValidUntil |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipCoordinator(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *FileLimitCheckRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowCoordinator
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: FileLimitCheckRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: FileLimitCheckRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field AccountIdentity", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.AccountIdentity = append(m.AccountIdentity[:0], dAtA[iNdEx:postIndex]...)
+			if m.AccountIdentity == nil {
+				m.AccountIdentity = []byte{}
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipCoordinator(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *FileLimitCheckResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowCoordinator
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: FileLimitCheckResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: FileLimitCheckResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Limit", wireType)
+			}
+			m.Limit = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Limit |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipCoordinator(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthCoordinator
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipCoordinator(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowCoordinator
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowCoordinator
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthCoordinator
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupCoordinator
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLengthCoordinator
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthCoordinator        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowCoordinator          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupCoordinator = fmt.Errorf("proto: unexpected end of group")
+)
diff --git a/coordinator/coordinatorproto/coordinator_drpc.pb.go b/coordinator/coordinatorproto/coordinator_drpc.pb.go
new file mode 100644
index 00000000..67f72ef7
--- /dev/null
+++ b/coordinator/coordinatorproto/coordinator_drpc.pb.go
@@ -0,0 +1,153 @@
+// Code generated by protoc-gen-go-drpc. DO NOT EDIT.
+// protoc-gen-go-drpc version: v0.0.32
+// source: coordinator/coordinatorproto/protos/coordinator.proto
+
+package coordinatorproto
+
+import (
+	bytes "bytes"
+	context "context"
+	errors "errors"
+	jsonpb "github.com/gogo/protobuf/jsonpb"
+	proto "github.com/gogo/protobuf/proto"
+	drpc "storj.io/drpc"
+	drpcerr "storj.io/drpc/drpcerr"
+)
+
+type drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto struct{}
+
+func (drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto) Marshal(msg drpc.Message) ([]byte, error) {
+	return proto.Marshal(msg.(proto.Message))
+}
+
+func (drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto) Unmarshal(buf []byte, msg drpc.Message) error {
+	return proto.Unmarshal(buf, msg.(proto.Message))
+}
+
+func (drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto) JSONMarshal(msg drpc.Message) ([]byte, error) {
+	var buf bytes.Buffer
+	err := new(jsonpb.Marshaler).Marshal(&buf, msg.(proto.Message))
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+func (drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto) JSONUnmarshal(buf []byte, msg drpc.Message) error {
+	return jsonpb.Unmarshal(bytes.NewReader(buf), msg.(proto.Message))
+}
+
+type DRPCCoordinatorClient interface {
+	DRPCConn() drpc.Conn
+
+	SpaceSign(ctx context.Context, in *SpaceSignRequest) (*SpaceSignResponse, error)
+	FileLimitCheck(ctx context.Context, in *FileLimitCheckRequest) (*FileLimitCheckResponse, error)
+}
+
+type drpcCoordinatorClient struct {
+	cc drpc.Conn
+}
+
+func NewDRPCCoordinatorClient(cc drpc.Conn) DRPCCoordinatorClient {
+	return &drpcCoordinatorClient{cc}
+}
+
+func (c *drpcCoordinatorClient) DRPCConn() drpc.Conn { return c.cc }
+
+func (c *drpcCoordinatorClient) SpaceSign(ctx context.Context, in *SpaceSignRequest) (*SpaceSignResponse, error) {
+	out := new(SpaceSignResponse)
+	err := c.cc.Invoke(ctx, "/coordinator.Coordinator/SpaceSign", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}, in, out)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *drpcCoordinatorClient) FileLimitCheck(ctx context.Context, in *FileLimitCheckRequest) (*FileLimitCheckResponse, error) {
+	out := new(FileLimitCheckResponse)
+	err := c.cc.Invoke(ctx, "/coordinator.Coordinator/FileLimitCheck", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}, in, out)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+type DRPCCoordinatorServer interface {
+	SpaceSign(context.Context, *SpaceSignRequest) (*SpaceSignResponse, error)
+	FileLimitCheck(context.Context, *FileLimitCheckRequest) (*FileLimitCheckResponse, error)
+}
+
+type DRPCCoordinatorUnimplementedServer struct{}
+
+func (s *DRPCCoordinatorUnimplementedServer) SpaceSign(context.Context, *SpaceSignRequest) (*SpaceSignResponse, error) {
+	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
+}
+
+func (s *DRPCCoordinatorUnimplementedServer) FileLimitCheck(context.Context, *FileLimitCheckRequest) (*FileLimitCheckResponse, error) {
+	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
+}
+
+type DRPCCoordinatorDescription struct{}
+
+func (DRPCCoordinatorDescription) NumMethods() int { return 2 }
+
+func (DRPCCoordinatorDescription) Method(n int) (string, drpc.Encoding, drpc.Receiver, interface{}, bool) {
+	switch n {
+	case 0:
+		return "/coordinator.Coordinator/SpaceSign", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{},
+			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
+				return srv.(DRPCCoordinatorServer).
+					SpaceSign(
+						ctx,
+						in1.(*SpaceSignRequest),
+					)
+			}, DRPCCoordinatorServer.SpaceSign, true
+	case 1:
+		return "/coordinator.Coordinator/FileLimitCheck", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{},
+			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
+				return srv.(DRPCCoordinatorServer).
+					FileLimitCheck(
+						ctx,
+						in1.(*FileLimitCheckRequest),
+					)
+			}, DRPCCoordinatorServer.FileLimitCheck, true
+	default:
+		return "", nil, nil, nil, false
+	}
+}
+
+func DRPCRegisterCoordinator(mux drpc.Mux, impl DRPCCoordinatorServer) error {
+	return mux.Register(impl, DRPCCoordinatorDescription{})
+}
+
+type DRPCCoordinator_SpaceSignStream interface {
+	drpc.Stream
+	SendAndClose(*SpaceSignResponse) error
+}
+
+type drpcCoordinator_SpaceSignStream struct {
+	drpc.Stream
+}
+
+func (x *drpcCoordinator_SpaceSignStream) SendAndClose(m *SpaceSignResponse) error {
+	if err := x.MsgSend(m, drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}); err != nil {
+		return err
+	}
+	return x.CloseSend()
+}
+
+type DRPCCoordinator_FileLimitCheckStream interface {
+	drpc.Stream
+	SendAndClose(*FileLimitCheckResponse) error
+}
+
+type drpcCoordinator_FileLimitCheckStream struct {
+	drpc.Stream
+}
+
+func (x *drpcCoordinator_FileLimitCheckStream) SendAndClose(m *FileLimitCheckResponse) error {
+	if err := x.MsgSend(m, drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}); err != nil {
+		return err
+	}
+	return x.CloseSend()
+}
diff --git a/coordinator/coordinatorproto/protos/coordinator.proto b/coordinator/coordinatorproto/protos/coordinator.proto
new file mode 100644
index 00000000..590f754a
--- /dev/null
+++ b/coordinator/coordinatorproto/protos/coordinator.proto
@@ -0,0 +1,52 @@
+syntax = "proto3";
+package coordinator;
+
+option go_package = "coordinator/coordinatorproto";
+
+service Coordinator {
+    // SpaceSign signs a space creation operation
+    rpc SpaceSign(SpaceSignRequest) returns (SpaceSignResponse);
+
+    // FileLimitCheck checks a limit by account and space
+    // can be used only:
+    //  - if a handshake identity matches a given identity
+    //  - if a requester contains in nodeconf list
+    rpc FileLimitCheck(FileLimitCheckRequest) returns (FileLimitCheckResponse);
+}
+
+message SpaceSignRequest {
+    string spaceId = 1;
+}
+
+message SpaceSignResponse {
+    SpaceReceiptWithSignature receipt = 1;
+}
+
+// SpaceReceiptWithSignature contains protobuf encoded receipt and its signature
+message SpaceReceiptWithSignature {
+    bytes spaceReceiptPayload = 1;
+    bytes signature = 2;
+}
+
+// SpaceReceipt contains permission to SpacePush operation
+message SpaceReceipt {
+    string spaceId = 1;
+    // identity of space owner
+    bytes accountIdentity = 2;
+    // identity of control node
+    bytes controlNodeIdentity = 3;
+    // unix-timestamp with a deadline time of receipt validity
+    uint64 validUntil = 4;
+}
+
+// FileLimitCheckRequest contains an account identity and spaceId
+// control node checks that identity owns a given space
+message FileLimitCheckRequest {
+    bytes accountIdentity = 1;
+    string spaceId = 2;
+}
+
+// FileLimitCheckResponse returns a current space limit in bytes
+message FileLimitCheckResponse {
+    uint64 limit = 1;
+}